Means for patching blow-outs in pneumatic tires



Jun 5; l 923.

T. H. -MDONALD MEANS FOR PATCHING BLOW-OUTS IN PNEUMATIC TIRES Filed May 17, 1922 the following is aspec-ification;

Patented June 5, 1923 I iiclamping ans. a apt d. to: direct the in fiation pressure tofclose instead of to pand the blow-out hole;

, tread of the tire casing at th'e-bloW-out hole, aha-r of less length'than the diameter of the basing, and hingedly connecting the ends zrnoiims HARVEY 'MQDOVNYALD, EANS non parcnme ianowsoums n i niiumemicfmmnsjj iliii pl igcation filed'l hay' 1 7, Serial 561,691." i

To all v Be it known that'I, THoMAs HARVEY-MC- DoNALD,-a citizen of the United States5and resident of Adelantog in'the county ofQSan Bernardino and State of California,' l 'ave invented new and useful- Means for Patching Blow-Outsin Pneumatic Tires, of which This [invention relates particularly to means for-"patching"blow-outs in pneumatic" automobile tires and the like, and includes a novel constructionflof clamp for holding the casing at the bl0W-out. It also includes in combination with the inner tube',the tire casing having a blow-out hole, anda, patch between the inflated inner. tube and the casing-an'dextending over theblow-out hole;

I have ,discoveredjthatb y applying to the of the bar with the rim the expansion caused bythe inflation of'the tubelwill be directed to closethe hole and that the patch and casing will be clamped hetween'the tube andthe casing and in f coopei'at ion with suchbar and expanding tubewill seal the blowout hole against any obtrusion through the hole v of any portion of the expanded'tubeand a blowgout clamp which illclo sethe blow- -is attached.

will thusfprevent the blow-out fromire across the tread of the blown out casingand is provided at its ,oppos'ite ends with .Connecting links hinged' to sa-id barandextending up to the bulge fot the casing and said links are connected tqthe frim by-attaching members and take-up means hinged to said links and adjustable with relation therevto so that the barv can be adjusted "to a proper distance'from the center of the'wheel.

An object of this invention-isf'tolprovide out gand-hold the alls forming the blow-out. An object-of this invention, is to provide a blow-out clamp which Will not be subject to undue contact with the roadsurfac'e when inuse. Another object ofithisinvention is to pro vide a blow-out clamp which-will". not be unsightly or disfigure the tire to whichit' "EE I q 4 ftion and the appended claims.

The acco invention, I v v Figure 1 is'an end elevation of ablovv ont t v.outwardly extending flanges 14, and-are pivyoa fannnanmm CALIFORNIALm simplicity and lightness K etail descrip- I drawing illustrates the clamp,1 constructed in accordance With'this invention, as applied to'an automobile tire ljother objects as bi e-a atite durability,

invention mayappear from the accompany- I l ing drawing, T the subj oined Which is. shown inysectionl fLine m a9 ,;f

Fig.8 indicatesfthe line-ofsection T the parts shown 'in} Fig.f'1'. v

Fig 3 n arged Pl i s Fig. 2 is a. fragmentaljsideielevation f inner-face of-the clamp lshowiigin Figs. a

sectionp, I p Th s: lIlVB-Il'CIOIl comprises'fthei amp 1 2, theparts 'be'ing in extendedposition.

. .75 Fig.1'GfisL-an'end elevationfof *a-mo'aifiea- 1 1 of; this -inventiomifasfapplied to1 a: I straightbeadiautoihobiletire which'is'show'n' I p Which is' 'adapted to cooperate with ;ta!patch jins' rted ajtil e c sin s so as to 1 hold, said "tire casing injposition to close the 'blQW .Tout3 andfpr'event the inner tube 4; ffomfpr'o .4

t-ruding .85

iThe d p on fi ef a tjw i ii "seml circularin" cross section and terminates at ts opposlte ends in upwardly'extending V a .c a v.

nected to ri'm19 in likemanner as thefarm.

connectionsf216 217, 214,218,, 212 213tothe tionlontbioth sides ,of the ha;' '5 to: be practically the same; lt-isgilnportant thatl one" or the other-,of-thesides, comprise members beif 12..

;; ii'm 19.1[ 'The' drawings show the construc- 4 i I ,Theattaching member's 12am ascia at their endsvvith flanges or anchorslS and 'equivalent'itothe and'attaching :mem-' otally connected at 15 to the links 8 by means'of the connections 16 engaging the flanges 14. The connections 16 comprise the hinge and take-up means at the bolt members 17, 18.

The attaching members, links and ends of the bar are proportionately curved so that when the clamp is attached in position on the rim of an automobile wheel to close a blow-out in the tire casing, the bolts 18 will be tightened causing the bar-5 to be embedded in the tread of the tire casing which will cause the side walls of the casing to expand transversely until it contacts with the members forming the clamp. The curvature of these members causes the side walls of the casing to be moved downward and inward so that the walls of the blow-out will be forced towards one another to prevent the blow-out from becoming larger.

In practical operation for patching a blow-out in a pneumatic tire the casing 2 will be removed from the rim 19 of the wheel and a thin piece of rubber 20 will be placed over the orifice forming the blow-out '3.

. A thin piece of fabric 21 is superimposed over the rubber strip 20 and is sufficiently large to overlap the edges of the rubber 20. The rubber 20 and fabric 21 reduces to a minimum the liability of the inner tube from being forced into the crevice forming the blow-out, and of water entering the tire through the blow-out. The inner tube will then be inserted into the casing 2 and the attaching member will then be positioned tire replaced on the rim. One of the attaching members 12 will be positioned so that its, anchor or flange 13 engages the inwardly extending edge or bead 22 of the rim .19.

The other attaching member will be disengaged from its cooperating connecting link loosening the bolt 18, and the disengaged so that its anchor or flange 18 engages the inwardly extending edge or bead 22 of the rim 19 atfla point opposite the first mentioned. attaching member.

The bolts 18 will then be inserted through the orifices provided therefor in the hinge members 17 and flanges 14:. The bolts 18 will then be tightened so as to embed the bar 5 in the tread of the tire casing and the inner tube is then inflated which forces the tire casing to expand around the bare.

It is thus seen that I have provided a clamp having anchors adapted to engage the rim of a wheel and a flexible'connection be- 7 tween said anchors comprising the bar and connecting links, and that portions of said clamp are adapted to be embedded in the periphery of the tire.

In the form illustrated in Fig. 6, I have shown a clamp 1, adapted for use in con nection with a straight bead tire and comthe periphery of a"tire; means pivotal vconnected atone end to one end of said bar prises the bar 5 having connecting links 8, 8' and 8 pivoted to the upwardly extending arms 6, 7 and to each other as at 11, 11 and 11, respectively."

The link 8" has a flange a to which the hinge member 17 is: detachably'secured by the bolt member '18.

The attaching members 12 are pivotally connected to the hinge member 17 as at 15 and have inwardly extending flanges 13 which are interposed'between the bead of the tire and the rim'19 of the wheel.

.The clamp shown in Fig. 6 is attached in practically the same manner as described for that shownin Figs. 1-5 except the flanges 13 are arranged so as to engage the forth comprising a bar; links pivoted to the ends of said her; hinges pivoted to said links; attaching members cooperatlng'wlth said hinges and each having a, flange at its ends, one of which flanges is adapted to engage the rim of a wheel and the otherof which flanges is adapted to be held in fixed relation to its cooperating hinge.

2. In a. device of the oharacter set forth,

a clamp comprising a bar adapted to: engage and adapted at its .other end to engage the rim of a wheel; a link pivotally connected to the other end of said bar; and anattaching member connected "at one end to said link and adapted at its other-end to engage the rim of a wheel'for the purpose specified.

In combination with a rim, a tire casing having a blow-out hole therein, an inflated tube in said casing, and a patch inserted within thetire casing and extending. over and around the blow-out hole; of a clamp having a bar adapted toengage the periphery of the tire casing over said hole and adjustable meansconnected to said her and adapted to be held between said rim and saidtire casing and adaptedto direct the force of expansion within the tire casing to prevent spreading of the walls from the blow-out and thereby cooperating with the tire casing and the patch to confine the. inflated pneumatic tube.

In testimony whereof, I have hereunto set my hand at Los Angeles, California,

this 24th day of February, 1922.

THOMAS HARVEY MCDONALD.

\Vitness: V H

James B. Towusnnn. 

